Patronymic surnames are family names derived from the given name of an ancestor, typically the father. These surnames often indicate lineage and can be found in various cultures around the world. For example, in Iceland, the surname "Jónsson" means "son of Jón," while "Jónsdóttir" means "daughter of Jón." In many cases, patronymic surnames change with each generation, reflecting the father's name. This practice contrasts with more static surnames found in cultures like England or France, where family names are passed down unchanged. Understanding patronymic surnames provides insight into cultural heritage and family connections.